18670197 has 16 divisors (see below), whose sum is σ = 30638720. Its totient is φ = 9847872.

The previous prime is 18670187. The next prime is 18670207. The reversal of 18670197 is 79107681.

It is an interprime number because it is at equal distance from previous prime (18670187) and next prime (18670207).

It is not a de Polignac number, because 18670197 - 2¹⁰ = 18669173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18670117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33922 + ... + 34467.

It is an arithmetic number, because the mean of its divisors is an integer number (1914920).

Almost surely, 2^18670197 is an apocalyptic number.

It is an amenable number.

18670197 is a deficient number, since it is larger than the sum of its proper divisors (11968523).

18670197 is a wasteful number, since it uses less digits than its factorization.

18670197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68412.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 18670197 is about 4320.9023363182. The cubic root of 18670197 is about 265.2872025655.

The spelling of 18670197 in words is "eighteen million, six hundred seventy thousand, one hundred ninety-seven".